New proposal model for thermal analysis in the cooling of a bundle finned pipes in air-cooled condenser

Abstract

In this paper, we present a new model for calculations of heat transfer during airflow over the finned tubes bank in air-cooled condenser systems (ACC). The model was correlated with 789 sets of available experimental data provided by ten authors of recognized prestige in the research area. The air flow bathes a package of finned tubes with an inclination of 450 to 600 with respect to the horizontal line. The studies were performed for ST/SL intervals between 0,4 and 2, airflow velocity of 0,1 to 100 m/s, an ambient temperature of 15 to 43 °C, the incident wind speed over the installation between 0 and 45 km/h, the outer equivalent diameter of the bare tubes between 0,019 and 0,05 m, a height of the fins between 2,7 and 7,5 mm, thicknesses of the fins ranging between 1,3 and 3,5 mm and a number of fins per unit tube length between 115 and 394. The mean deviation found was 6,9% in 84,8% of the correlated experimental data.